1) Set everyone's total experience to 0. Give players with lot of exp rebirth
race selection according to current total experience.
2) Make the experience gained affect only current background player is
playing. Remove exp value of monsters, make experience based on things you do
at different guilds (for example, healers get exp when they heal people,
merchants get exp when they repair things).
3) Before you totally stun this idea, give it a little thought

So, you pretty much want to follow rules from Planescape: Torment for exps.
It'll definitely make this game more difficult. On the other hand, it does
hold merits since what the present incarnation knows at birth would be related
to what the previous incarnations knows and that is what reincarnation is all
about.

Sir the Master Merchant
For Pricing Information - "finger sir"